package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;
    /**
     * 指定时间内营业额统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放从begin到end范围内每天的日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end))
        {
            //日期计算，计算指定日期后一天对应的日期
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        List<Double> turnoverList=new ArrayList<>();
        for (LocalDate date : dateList) {
            //查询date日期对应的营业数据，状态已完成的订单的金额合计
            //获取一天开始时间和结束时间 00:00:00--23:59:59
            LocalDateTime beginTime=LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date, LocalTime.MAX);
            //select sum(amount) from orders where order_time > ? and order_time < ? and status = 5
            Map map=new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover=orderMapper.sumByMap(map);
            if(turnover==null){
                turnover=0.0;
            }
            turnoverList.add(turnover);
        }
        String DL=StringUtils.join(dateList, ",");
        String TL=StringUtils.join(turnoverList, ",");
        TurnoverReportVO turnoverReportVO=new TurnoverReportVO();
        turnoverReportVO.setDateList(DL);
        turnoverReportVO.setTurnoverList(TL);

        return turnoverReportVO;
    }
    /**
     * 用户统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        UserReportVO userReportVO=new UserReportVO();
        //当前集合用于存放从begin到end范围内每天的日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end))
        {
            //日期计算，计算指定日期后一天对应的日期
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        String DL=StringUtils.join(dateList, ",");
        userReportVO.setDateList(DL);

        //每天新增用户数量 select count(id) from user where create_time< ? and create_time > ?
        List<Integer> newUserList=new ArrayList<>();
        //每天总用户数量 select count(id) from user where create_time < ?
        List<Integer> totalUserList=new ArrayList<>();

        for (LocalDate date : dateList) {
            //查询date日期对应的营业数据，状态已完成的订单的金额合计
            //获取一天开始时间和结束时间 00:00:00--23:59:59
            LocalDateTime beginTime=LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date, LocalTime.MAX);
            Map map=new HashMap();

            map.put("end",endTime);
            //总用户数量
            Integer totalUser=userMapper.countByMap(map);
            map.put("begin",beginTime);
            //新增用户数量
            Integer newUser=userMapper.countByMap(map);

            totalUserList.add(totalUser);
            newUserList.add(newUser);

        }

        String NL=StringUtils.join(newUserList, ",");
        String TL=StringUtils.join(totalUserList, ",");
        userReportVO.setTotalUserList(NL);
        userReportVO.setNewUserList(TL);
        return userReportVO;
    }
    /**
     * 统计指定时间内的订单数据
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        OrderReportVO orderReportVO=new OrderReportVO();
        //当前集合用于存放从begin到end范围内每天的日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end))
        {
            //日期计算，计算指定日期后一天对应的日期
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        String DL=StringUtils.join(dateList, ",");
        orderReportVO.setDateList(DL);
        //每天订单总数
        List<Integer> orderCountList=new ArrayList<>();
        //
        List<Integer> validOrderCountList=new ArrayList<>();
        //遍历集合，查询每天有效订单数和订单总数
        for(LocalDate date : dateList) {
            //查询每天订单总数 select count(id) from orders where order_time > ? and order_time < ?
            //获取一天开始时间和结束时间 00:00:00--23:59:59
            LocalDateTime beginTime=LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date, LocalTime.MAX);

            Integer orderCount=getOrderCount(beginTime,endTime,null);
            orderCountList.add(orderCount);
            //查询每天有效订单数 select count(id) from orders where order_time > ? and order_time < ? and status = 5
            Integer validOrderCount=getOrderCount(beginTime,endTime,Orders.COMPLETED);
            validOrderCountList.add(validOrderCount);


        }
        String OL=StringUtils.join(orderCountList, ",");
        String VL=StringUtils.join(validOrderCountList, ",");
        orderReportVO.setOrderCountList(OL);
        orderReportVO.setValidOrderCountList(VL);
        //计算时间区间内的订单总数
        Integer totalOrderCount=orderCountList.stream().reduce(Integer::sum).get();
        //计算时间区间内的有效订单数量
        Integer validOrderCount=validOrderCountList.stream().reduce(Integer::sum).get();
        //计算订单完成率
        double orderCompletionRate=0.0;
        if(totalOrderCount!=0){
            orderCompletionRate=validOrderCount.doubleValue() / totalOrderCount;
        }


        orderReportVO.setTotalOrderCount(totalOrderCount);
        orderReportVO.setValidOrderCount(validOrderCount);
        orderReportVO.setOrderCompletionRate(orderCompletionRate);
        return orderReportVO;
    }
    /**
     * 统计指定时间区间内的销量排名top10
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        //获取一天开始时间和结束时间 00:00:00--23:59:59
        LocalDateTime beginTime=LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime=LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> salesTop10=orderMapper.getSalestop10(beginTime,endTime);

        List<String> name=salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList=StringUtils.join(name, ",");
        List<Integer> numbers=salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList=StringUtils.join(numbers, ",");

        SalesTop10ReportVO salesTop10ReportVO=new SalesTop10ReportVO();
        salesTop10ReportVO.setNameList(nameList);
        salesTop10ReportVO.setNumberList(numberList);
        return salesTop10ReportVO;
    }
    /**
     * 导出运营数据报表
     * @param response
     */
    @Override
    public void exportBusinessData(HttpServletResponse response) {
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        LocalDateTime beginTime=LocalDateTime.of(dateBegin, LocalTime.MIN);
        LocalDateTime endTime=LocalDateTime.of(dateEnd, LocalTime.MAX);
        //查询数据库，获取营业数据--查询最近30天的营业数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(beginTime, endTime);
        //通过poi，将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try{
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);
            //填充数据
            //获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间:"+dateBegin+"至:"+dateEnd);
            //获取第四行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row .getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获取第五行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());
            //填充明细数据
            for(int i =0;i<30;i++){
                LocalDate date=dateBegin.plusDays(i);
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }
            //通过输出流，将Exccel文件下载到客户端浏览器
            ServletOutputStream out =response.getOutputStream();
            excel.write(out);


            //关闭资源
            excel.close();
            out.close();
        } catch (IOException e){
            e.printStackTrace();
        }




    }

    /**
     * 根据条件统计订单数量
     * @param begin
     * @param end
     * @param status
     * @return
     */
    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end,Integer status) {
        Map map=new HashMap();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);
        return orderMapper.countByMap(map);
    }
}
